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AssigneeSCA Hygiene Products AB
InventorsAnders Tennby, Thomas Åberg, Bo Thornström, Kenneth Henriksson, Roy Hansson
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The invention relates to a device and a method for producing a material laminate (1) by fixing pieces of material (2) at a given distance from one another on a first continuously advanced material web (4). The invention is characterized in that the pieces of material (2) are cut from a second continuous web (7) in a first station (3) and are conveyed via a transport device (10) to the first web (4), to which the piece of material (2) is attached by means of ultrasonic welding over a limited attachment area (5) on the pieces of material (2), and the pieces of material (2) are subsequently fixed to the material web (4) by ultrasonic welding in a second station (6). The second station comprises an ultrasonic horn (18) at a fixed distance from a stay (19) designed as a rotating drum with a patterned outer surface.
Method for fixing pieces of material at a given distance from one anothe,r on a continuously advanced material web, preferably for production of a material laminate for use in an absorbent product, characterized in that each piece of material is in a first station placed in the desired position on the material web and is attached in this position by ultrasonic welding in a pattern within at least an area which covers a part of the contact surface of the piece of material against the material web, and is subsequently fixed on the material web by ultrasonic welding in a second station with a pattern which covers essentially the entire contact surface against the material web.
Device for fixing pieces of material at a given distance from one another on a continuously advanced material web, preferably for production of a material laminate for use in an absorbent product, characterized by on the one hand a first station with an ultrasonic horn positioned on one side of the material web and a transport and stay device positioned on the opposite side of the material web and intended for placing a piece of material in the desired position on the material web and attaching the piece of material to the material web within a limited area in interaction with the ultrasonic horn, and on the other hand a second station with a second ultrasonic horn on one side of the material web and a stay device on the opposite side of the material web, which stay device is designed with a patterned surface which faces the material web and is intended, in interaction with the second ultrasonic horn, to fix the piece of material to the material web with the desired welding pattern which covers essentially the entire contact surface of the piece of material.
Dependencies are inferred from the claim text.